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Old 02-10-2022, 07:23 AM
Bc409 Bc409 is offline
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Join Date: Sep 21, 2019
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Fuel pump lifespan

What are opinions on why the v8 mechanical fuel pumps do not last long? I am an old guy have had rigs with pumps literally decades old that still work. Now my 78 wagoneer has had 2 go bad in less than a year. I am not a racer so do not need a robbmc pump. The tank has been cleaned, the filters are fine.did not really want to switch to electric but this is ridiculous.
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Old 02-10-2022, 08:16 AM
inkedmonkey inkedmonkey is offline
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That is weird. I've never had a problem with mechanical pumps. Can you try a different brand?
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Old 02-10-2022, 08:30 AM
rocklaurence rocklaurence is offline
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I had the same issue. I replaced 3 in 2 years--cheap Box store replacements. I believe Summit offers a performance replacement. However, I went to Holley Electric and havent had a Vapor-lock issue and easier starts over the past 7 years. Note: I draw a grnd wire from the battery and land it at the frame next to the pump. IMO, electric pump issues are related to bad connections.
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Old 02-10-2022, 10:13 AM
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babywag babywag is offline
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today's new aftermarket parts are a sad sad joke!
especially anything that uses "rubber".
back in the day stuff lasted decades, now you're likely if it works out of the box.
the "rubber" they use today degrades incredibly fast.
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Old 02-11-2022, 09:02 AM
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nograin nograin is offline
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The one time I thought the pump was bad it was actually the rubber feed line.
So got almost 200,000 miles out of the original pump AFIAK.
The rebuilt engine has a new pump. So far no issues.
Thats my experience
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Old 02-11-2022, 12:49 PM
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timwiller timwiller is offline
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ethanol is bad for cheap taiwanese rubber
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Old 02-11-2022, 06:06 PM
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babywag babywag is offline
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Quote:
Originally Posted by timwiller
ethanol is bad for cheap taiwanese rubber

taking it out of the box is bad for cheapnese aftermarket crap

put a brand new pump on my dad's GW in MN ~10yrs ago.
he always used real gas
didn't last 6 months
2nd one worked longer
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